The two left-most squares indicate the outline and fill colours respectively. For most drawn objects, the user can '''set the outline colour by left-clicking on the colour palette''', and '''set the fill colour by right-clicking on the colour palette'''. For selecting the fill paint tool colour, the user selects the fill colour by left-clicking the colour palette. The pyramid-shaped icon to the left of the colour palette sets transparency as opposed to a fill colour. An interesting feature is the right-most icon (resembling a cube) which is a '''colour similarity (matching) tool'''. This tool will match and set the colour of an object that the user clicks on. Therefore, the user can match the colour of existing objects without having to guess.